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- W3214022744 abstract "Terahertz (THz) science and technology have received increasing demand in recent decades for sensing applications. Additionally, THz metamaterials have presented unique characteristics for sensing applications owing to their adjustable resonance frequency. In this paper, we propose a polarization independent metasurface structure serving as a refractive-index-based sensor at THz frequencies. The unit cell is composed of two perpendicularly intersecting metallic bars at the middle of which a cylindrical metallic element is placed. The structure represents a sharp resonance with a high Q-factor of 475 in the absorption profile, which, in some cases, can even reach values as high as 3052.75, revealing confinement of the profile in a narrow band around the resonance frequency of 1.75 THz. Furthermore, the highest values of sensitivity and the figure of merit turn out to be, respectively, 7000 nm/RIU and 19.44 1/RIU, both of which can even take higher values of 11500 nm/RIU and 89.15 1/RIU, respectively, in some special cases of structural dimensions. Finally, the sensor is successfully employed for detecting crystalline sugar molecules." @default.
- W3214022744 created "2021-11-22" @default.
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- W3214022744 date "2021-12-01" @default.
- W3214022744 modified "2023-10-16" @default.
- W3214022744 title "High Q-factor terahertz metamaterial for superior refractive index sensing" @default.
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- W3214022744 doi "https://doi.org/10.1364/josab.438773" @default.
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